Systems and Methods for Billing Content Providers for Designated Content Delivered Over a Data Network

ABSTRACT

Some embodiments provide multi-tenant billing systems and methods whereby data network usage fees that are associated with delivering select content of different content providers over a data network are passed to the content provider that originates or is the source for that select content instead of the end users that request and receive the select content. A deep packet inspection server or a billing server may be configured with a list of identifiers to distinguish between the network usage that is related to the delivery of the designated free content from the network usage that is not related to the delivery of the designated free content. The network usage can be distinguished by filtering or processing usage logs that track the network usage using the configured list of identifiers. Such filtering or processing can be done in real-time or in a delayed manner in a standalone or integrated system.

TECHNICAL FIELD

The present invention relates to content delivery over data networksand, more specifically, to billing for content that is delivered overthe data networks.

BACKGROUND ART

Data networks operated by various service providers enable end usersaccess to the digital content and digital services of various contentproviders that are located throughout the Internet. These data networksexist in many different incarnations. One such incarnation is the mobiledata network that is operated by wireless service provider such asVerizon®, AT&T®, and the like. Some of the digital content that isaccessible through these data networks is embodied as text, images,audio (i.e., music), video, and applications. Some of the digitalservices that are accessible through these data networks provide the enduser access to email, social media, messaging, various cloud basedservices, and web browsing. As used hereafter, the term content is usedto interchangeably refer to digital content and digital services.

It is the goal of the content providers to have their content reach asmany end users as possible. This goal is derived from the underlyingdesire of the content provider to monetize the content that itoriginates. For example, the content provider can monetize its contentby selling the content, receiving advertising revenue for advertisementthat is passed in conjunction with the content, and gaining influenceand exposure in order to promote goods and services of the contentprovider and those of others. Other content providers may want to reachas many end users as possible for non-monetary reasons includinginforming and educating content consumers as one example.

The prolific adoption of network enabled devices (e.g., smartphones andtablets) that can access content through mobile data networks and therapid evolution to faster, higher capacity mobile data networks, such as3G and 4G packet switched networks (e.g., HSPA+, WiMAX, LTE, etc.), haveresulted in greater connectivity for the public at large. Thisconnectivity allows end users to access content whenever and wherever solong as a network enabled device is within reach. Moreover, the everincreasing performance of these devices and the increased bandwidth andcapacity offered by today's mobile data networks has caused an evolutionin the content that is being consumed. No longer is the content beingdelivered primarily text based or low resolution. Instead, much of thecontent being delivered over the data networks today is feature rich andfully functional content including video, games, applications, etc.

This degree of connectively comes at a cost to both end users and mobiledata network service providers. For the end user, the cost is manifestedin the one or more data access plans that the end user pays for in orderto have connectivity. This cost is usually multiplied by the number ofnetwork enabled devices that the end user has. For example, the end usermay pay for one data access plan to obtain broadband data access for thehome, another data access plan for a smartphone that connects through amobile data network, and yet another data access plan for a tablet thatconnects through the same or different mobile data network. End usersmitigate this cost by purchasing data access plans that provideanticipated amounts of data consumption. For example, an end user mayopt for a less expensive one gigabyte per month data access plan asopposed to a more expensive four gigabyte per month data access planwhen content consumption is expected to fall below one gigabyte of dataper month. Such plans are usually subject to expensive overage feesshould the end user exceed the allowed amount of data usage. In someinstances, the end user may forego purchasing a data access plan for adevice because of these connectively costs. Instead of paying for thedata access plan, the end user may opt to only use network functionalityof the device when the device is within a freely accessible WiFihotspot. As a result of the costs for data access, much of thefunctionality of the device can be crippled, thereby degrading theoverall end user experience.

For the mobile data network service provider, the cost is manifested inthe infrastructure deployment and purchasing or licensing of wirelessspectrum that is needed to expand the service provider's capacity tomeet the ever increasing demand for content. To offset some of thedemand, service providers have resorted to capping the amount of contentthat end users are allowed to consume as part of the service provider'soffered data access plans. Other service providers simply charge the enduser for every incremental amount (e.g., kilobyte) of content that isdelivered over the service provider's network.

This metering of data network access and the associated costs discourageend users from 1) freely experimenting with new content, 2) seeking newcontent, and 3) accessing feature rich content (e.g., video, high bitencoded audio, applications, online games, etc.). For instance, an enduser is less likely to stream video to his device when the end user hasa one hundred megabyte per month access plan and the video is expectedto consume a significant percentage of data from that access plan.Similarly, an end user is less likely to idly browse and access newcontent when the everyday content consumed by the end user (e.g.,emails, commonly used networked applications, etc.) consumes a majorityof the data access plan purchased by that end user. This in turndevalues the content of the content providers, lowers the return on datanetwork infrastructure improvements, and creates a less enjoyableoverall end user experience.

Accordingly, there is a need for new usage and billing models that allowend users access to select content without charging the end users forevery kilobyte of data that is associated with delivering that selectcontent to the end user. Similarly, there is a need for new usage andbilling models to allow end users access to select content withoutincreasing costs to the mobile data network service provider and withoutreducing revenue of the mobile data network service provider.Furthermore, there is a need for new usage and billing models to promoteselect content of the content providers while allowing the contentproviders to achieve their goals of monetizing their content by sellingmore content, selling more advertising, and gaining influence andexposure.

SUMMARY OF THE INVENTION

It is an objective of the embodiments described herein to providemulti-tenant billing systems and methods whereby data network usage feesthat are associated with delivering select content of different contentproviders over a data network are passed to the content provider thatoriginates or is the source for that select content instead of the endusers that request and receive the select content. Stated differently,it is an objective to provide multi-tenant billing systems and methodswhereby end users are not assessed data network usage fees for the datanetwork usage that is related to the delivery of the select content thatis designated by the data network service provider to be free content.It is further an objective to provide these and other objectives withoutcost to the data network service provider while also giving the datanetwork service provider incentive to utilize these systems and methods,wherein the incentive to the data network service provider includes 1)receiving payment from one or more content providers instead of one ormore end users for the data network usage that is related to thedelivery of the select content and 2) providing a promotional vehicle ordifferentiator with which the data network service provider can offerexclusive free content or otherwise distinguish itself from itscompetitors. There is also an incentive for content providers toparticipate in such billing systems and methods and to incur the datanetwork usage fees on behalf of some end users, wherein the incentive tothe content providers includes 1) having the select content that isdesignated as free content reach a broader audience, 2) better establishdemand for new content that is disseminated free of data network usagefees, and 3) generate revenue via alternative means made availablethrough the delivery of the free content (e.g., advertising). Inachieving these objectives, it is a goal to remove many of the barriersthat prevent end users from fully accessing content when using a limitedaccess or metered access data network, wherein the barriers wouldotherwise prevent end users from experimenting or trying new contentand, wherein content providers are discouraged from originating newcontent as a result.

To achieve these and other objectives, some embodiments provide amulti-tenant billing system with associated billing methods thatintegrate with or replace existing billing systems of a data networkservice provider. It is intended that the billing system be integratedwith a mobile data network that provides end user subscribers withwireless access to content on a metered or limited basis. However, thebilling system may be integrated with any data network and the billingsystem is therefore not restricted to a mobile data network. The billingsystem may be wholly integrated in the infrastructure of the datanetwork. Alternatively, the billing system may be partially or whollyintegrated into the infrastructure of a third party partner of the datanetwork service provider. For example, the billing system may beoperated by a content delivery network (CDN) that partners with the datanetwork service provider to accelerate content delivery for end users ofthe data network service provider.

In some embodiments, the billing system designates select content thatis to pass across a data network as “free content”. The billing systemis a multi-tenant system by virtue of the ability to support thedesignation of different content from different content providers asfree content. The billing system redistributes the data network usagefees that are associated with the delivery of the designated freecontent from the end users that receive the designated free content tothe content providers that originate or are the source for thedesignated free content. In so doing, end users are able to receive thedesignated free content from the data network without incurring datanetwork usage fees.

The billing system operates using at least one deep packet inspection(DPI) server. The DPI server may include a gateway server that monitorsthe traffic entering into the data network of the service provider froman external data network (e.g., the Internet) and that monitors thetraffic exiting the data network of the service provider to the externaldata network. The DPI server monitors the content in order to track theusage of the service provider's data network on a metered basis. In someembodiments, the DPI server enters the data network usage that isassociated with each instance of content that is delivered over the datanetwork to a usage log. In some embodiments, the DPI server enters thedata network usage on a per end user subscriber basis to generatedifferent end user usage logs. Each end user usage log tracks the usageof the data network by a particular end user over a period of time.Stated differently, each end user usage log tracks the content that wasrequested and delivered to a particular end user subscriber of the datanetwork.

The billing system filters the usage log(s) of the DPI server in orderto redistribute the data network usage fees that are associated with thedelivery of the designated free content from the end users to thecontent providers. In some embodiments, filtering involves removing orzeroing out the data network usage that is related to the delivery ofthe designated free content from the end user usage logs. In someembodiments, the billing system enters the filtered data network usagefrom the end user usage logs to an appropriate content provider usagelog. Individually, each content provider usage log tracks the networkusage that is related to the designated free content that is originatedor sourced from a particular content provider and that is delivered toany number of end user subscribers of the data network. Collectively,the content provider usage logs track the data network usage that isrelated to the delivery of the designated free content.

Instead of filtering the usage log(s) of the DPI server, someembodiments process the usage logs to classify entries that tracknetwork usage that is related to the delivery of the designated freecontent from the entries that track network usage that is not related tothe delivery of the designated free content.

The filtered or processed end user usage logs are then used to bill eachend user for the data network usage by the end user that is not relatedto the delivery of the designated free content. The content providerusage logs are used to bill each content provider for the designatedfree content that the content provider originates or is the source ofand that is delivered to various end user subscribers of the datanetwork.

In some embodiments, the billing system filters or processes the datanetwork usage in real-time as the content passes through the datanetwork. To do so, the DPI server is configured with a list ofidentifiers for identifying the designated free content and foridentifying the network usage that is related to the delivery of thedesignated free content. The list of identifiers identifies the contentproviders that originate or are the source of the designated freecontent based on their assigned Internet Protocol (IP) addresses, IPblocks, subnets, and other addressing. In some embodiments, the list ofidentifiers identifies IP addresses, IP blocks, subnets, and otheraddressing that are associated with a CDN or other third party thatdelivers the designated free content on behalf of the content providers.In some embodiments, the list of identifiers identifies the designatedfree content based on parameters of Domain Name System (DNS) requests,HyperText Transfer Protocol (HTTP) headers, and Uniform ResourceLocators (URLs). In some embodiments, the list of identifiers identifiesone or more applications that can be used to access the designated freecontent based on addressing, port numbering, protocols, or somecombination thereof. Filtering in this manner is also referred to hereinas on-the-fly filtering.

In some embodiments, the billing system further includes a billingserver that aggregates the end user usage logs and the content providerusage logs from the DPI server. The billing server processes theaggregated logs to bill the end users for their usage of the datanetwork that is not related to the delivery of the designated freecontent and to bill each particular content provider for the usage ofthe data network that is related to the delivery of content of theparticular content provider that is designated as free content.

When the billing system performing on-the-fly filtering is implementedusing infrastructure of the data network and a third party, such as aCDN, a DPI server of the data network is configured with a list ofidentifiers to identify the designated free content. The DPI serverfilters the end user usage logs by generating and populating the enduser usage logs with the metered data network usage that is not relatedto the delivery of the designated free content while excluding the datanetwork usage that is related to the delivery of the designated freecontent from the end user usage logs. The metering of the data networkusage that is related to the delivery of the designated free content isperformed by the third party partner. When the third party partner is aCDN, the caching servers of the CDN host and provide accelerateddelivery for the content that is designated as free content. The cachingservers track in their server logs, the network usage that is associatedwith delivering the designated free content from the caching servers tothe end user subscribers of the data network. The billing server of thebilling system then aggregates the end user usage logs from the DPIserver to bill the end users for their corresponding data network usagethat does not include the network usage that is related to the deliveryof the designated free content. The billing server also aggregates theserver logs from the CDN caching servers. From the CDN caching serverlogs, the billing server sums the data network usage that is related tothe delivery of the designated free content on per content providerbasis and bills each content provider for the amount of data networkusage that is attributed to the content of the content provider that isdesignated as free content.

In some embodiments, the billing system performs delayed filtering. Insome such embodiments, the billing system does not filter the end userusage logs in real-time, but at appointed times. In suchimplementations, the original log reporting function of the data networkneed not be modified. Specifically, the DPI server populates eachparticular end user usage log with any data network usage that isidentified for the end user that is associated with that particular enduser usage log. The billing system then filters or processes the enduser usage logs at appointed times, such as at the end of an end userbilling cycle.

When the billing system performing delayed filtering is whollyintegrated in the infrastructure of the data network, one or more of theend user usage logs are passed from the DPI server to a billing serverat one of the appointed times. The billing server is configured with alist of identifiers that identifies the content that is designated asfree content. Using the list of identifiers, the billing serverprocesses the end users logs to identify data network usage that isrelated to the delivery of free content. In some embodiments, thebilling server zeros out or removes the identified usage relating to thedesignated free content from the end user usage logs before billing theend users for the remaining data network usage that is not related tothe delivery of the designated free content. The zeroed out or removeddata network usage, which is the data network usage that is identifiedas being related to the delivery of the designated free content, isattributed to the content provider that originates or is the source forthe content that is designated as free content. The billing server thenbills the corresponding content providers for the data network usagethat is related to the delivery of the designated free content.

When the billing system performing delayed filtering is integrated inthe infrastructure of the data network and in the infrastructure of aCDN, the billing server aggregates end user usage logs from the DPIserver and server logs from the CDN caching servers. The billing serveris configured with a list of identifiers to filter or process theaggregated logs in order to bill end users for their usage of the datanetwork that is not related to the delivery of the designated freecontent and to bill the appropriate content providers for the usage ofthe data network that is related to the delivery of the designated freecontent.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to achieve a better understanding of the nature of the presentinvention, preferred embodiments for the billing systems and associatedbilling methods will now be described, by way of example only, withreference to the accompanying drawings in which:

FIG. 1 presents an exemplary mobile data network architecture.

FIG. 2 provides an overview process for delivering select content to endusers over a data network in accordance with the billing systems andassociated methods of some embodiments, whereby the data network usagefees for delivering the select content over the data network is incurredby the content providers that originate or are the source for thecontent and not by the end users that request and receive the selectcontent using the data network.

FIG. 3 presents a process describing operation of the DPI server whenmodified to perform data network usage filtering in accordance with someembodiments.

FIG. 4 illustrates filtering network usage by omitting from an end userusage log, record of network usage that is related to the delivery ofdesignated free content.

FIG. 5 illustrates filtering network usage by zeroing out network usagethat is related to the delivery of designated free content from an enduser usage log.

FIG. 6 conceptually illustrates a DPI server inspecting content passingthrough a data network and filtering the corresponding data networkusage to end user usage logs and content provider usage logs inaccordance with some embodiments.

FIG. 7 presents a process that is performed by the DPI server to performdelayed filtering in accordance with some embodiments.

FIG. 8 conceptually illustrates performing delayed filtering inaccordance with some embodiments.

FIG. 9 conceptually illustrates the DPI server performing delayedfiltering in which the data network usage that is related to thedelivery of the designated free content is zeroed out from the end userusage logs and is entered in the appropriate content provider usagelogs.

FIG. 10 presents a process for performing delayed filtering byprocessing the end user usage logs in accordance with some embodiments.

FIG. 11 presents an exemplary data network architecture that isintegrated with components of a CDN.

FIG. 12 illustrates operation of the billing system when performingon-the-fly filtering in an integrated framework in accordance with someembodiments.

FIG. 13 presents a process performed by the billing server in anintegrated framework whereby delayed filtering is performed inaccordance with some embodiments.

FIG. 14 illustrates a computer system or server with which someembodiments are implemented.

DETAILED DESCRIPTION

In the following detailed description, numerous details, examples, andembodiments for the billing systems and associated billing methods areset forth and described. As one skilled in the art would understand inlight of the present description, the systems and methods are notlimited to the embodiments set forth, and the systems and methods may bepracticed without some of the specific details and examples discussed.Also, reference is made to the accompanying figures, which illustratespecific embodiments in which the systems and methods can be practiced.It is to be understood that other embodiments can be used and structuralchanges can be made without departing from the scope of the embodimentsherein described.

The billing systems and associated methods are applicable to any datanetwork and to any service provider of a data network that providesmetered or limited access to the data network. In other words, thebilling systems and associated methods are applicable to any datanetwork that bills or tracks end user usage of the data network on anincremental or metered basis. Such metered or limited access is mostcommon with mobile data networks. Some examples of service providersthat operate mobile data networks in the United States include Verizon®,AT&T®, and Sprint®. It should be apparent that several other mobile datanetwork service providers operate within the United States and aroundthe world, and that the billing systems and associated methods presentedherein are applicable to any such data network or service provider.Accordingly, the term data network is broadly recited to encompass adata network that uses one or more network technologies propagated bywireless standards bodies of the 3rd Generation Partnership Project(3GPP) (e.g., 2.5G, 3G, 4G wireless technologies including EDGE, HSPA,HSPA+, WiMAX, LTE, etc.).

To aid in the discussion that is to follow, an exemplary mobile datanetwork architecture is provided with reference to FIG. 1. In FIG. 1,the mobile data network includes a core network 110 and radio accessnetworks (RANs) 120 and 130. The core network 110 includes a packet datanetwork gateway (PDN GW) 140, a mobility management entity (MME) 145, aserving gateway (SGW) 150, and a billing server 160. The core network110 may further include additional supporting components such as anauthentication, authorization, and accounting (AAA) server and a homesubscriber server (HSS).

Each RAN 120 and 130 provides wireless connectivity for end usersubscribers of the illustrated mobile data network to the core network110. Depending on the technology used to implement the mobile datanetwork, the RANs 120 and 130 may be representative of 1) GSM EDGE RadioAccess Networks (GERANs) comprising one or more base station subsystems(BSSs) that control one or more base transceiver stations (BTSs), 2)UMTS Terrestrial Radio Access Networks (UTRANs) comprising one or moreradio network controllers (RNCs) that control one or more Node B's, or3) evolved RANs (e-RANs) comprising one or more eNode B's. Each RAN 120and 130 establishes one or more wireless service regions for the mobiledata network.

An end user or end user subscriber of the exemplary mobile data networkillustrated in FIG. 1 is defined as any entity that can access theexternal data network through any of the wireless service regions of themobile data network. In order to gain such access, the end user maysubscribe to prepaid or postpaid data access plans offered by the datanetwork service provider. Alternatively, the end user may obtain accesson a pay-as-you-go basis. End users access data networks using networkenabled devices. Network enabled devices may have wired or wirelessaccess to one or more data networks of one or more service providers.These devices may include desktop, laptop, notebook, netbook, andultrabook computers, MiFi or personal hotspot devices, and mobilecommunication devices such as smartphones, tablets, portable digitalassistants (PDAs). This enumerated listing is not intended to be anexhaustive listing, but merely an exemplary listing of common devicesused to access data networks.

The PDN GW 140 connects the mobile data network of the service providerto at least one external data network (e.g., the Internet). Stateddifferently, the PDN GW 140 allows end users connected to a RAN 120 or130 to access content from one or more external data networks.Accordingly, the PDN GW 140 serves as the entry point and exit point forcontent entering and exiting the mobile data network through the RANs120 and 130. The MME 145 is responsible for tracking end user movementfrom one RAN to another RAN of the mobile data network. Other functionsof the MME 145 include paging end users, performing handover, enforcingroaming restrictions, etc. In some architectures, the PDN GW 140 isrepresentative of a Gateway GPRS Support Node (GGSN) and the MME 145 isrepresentative of a Serving GPRS Support Node (SGSN).

In some instances, the PDN GW 140 performs deep packet inspection (DPI)of content entering and exiting the core network 110 for purposes ofmetering end user usage of the data network. Such metered usage isentered to one or more usage logs. In some embodiments, the PDN GW 140enters the data network usage on a per end user subscriber basis togenerate different end user usage logs. Each end user usage log tracksthe usage of the data network by a particular end user over a period oftime. Stated differently, each end user usage log tracks the contentthat was requested and delivered to a particular end user subscriber ofthe data network. Each particular end user usage log may include otherinformation for identifying the end user that is associated with thatparticular end user usage log, identifying the content that is deliveredto that end user, identifying the source from which the content isdisseminated to the end user, and identifying the network usage or theamount of data that is consumed as a result of delivering each item ofidentified content from the source to the end user. In some embodiments,each end user usage log may be derived from a single master usage log,wherein that master usage log tracks the data network usage for all endusers albeit with various identifiers that enable parsing of the masterusage log to produce the various end user usage logs. The end user usagelogs may be embodied as distinct physical logs comprising partitionedentries of the master usage log, wherein the distinct physical logs areseparate files, tables, databases, or other data structures than that ofthe master usage log. Alternatively, the end user usage logs mayrepresent a logical partitioning of the master usage log in which themaster usage log is embodied as a single data structure with variousflags, tags, or identifiers designating the logical partitioning of thatdata structure on an end user basis. Different data networks perform theDPI using other components instead of or in addition to the PDN GW 140.For generalization and for the purposes of the discussion that is tofollow, the DPI and log reporting is generalized to be performed by aDPI server of the data network. It should be apparent to one of ordinaryskill that the DPI server can include any one or more of the PDN GW 140,MME 145, a gateway device of the data network, or server that is knownin the art to perform DPI. Moreover, the functionality of the DPI servermay be performed by one or more separate servers whereby a first serverperforms deep packet inspection and a second server that is coupled tothe first server generates the usage logs (e.g., end user usage logs)based on the deep packet inspection. The generalization of the DPIserver is provided for application of the billing systems and associatedmethods to differing data network architectures and technologies. Also,reference will be made hereafter to end user usage logs. It should beapparent to one of ordinary skill in the art that end user usage logs orlogs that track network usage on an end user basis can be derived fromany usage log that tracks all network usage without distinguishingbetween end users. Specifically, end user logs can be derived fromgeneric usage logs by splitting the network usage that is identified inthe usage logs on an Internet Protocol (IP) address basis, wherein theIP address is a destination IP address or an IP address for the end userthat consumes the network usage by receiving content.

The billing server 160 accesses the end user usage logs from the DPIserver to bill end users for their usage of the data network on alimited or metered basis. This may include ensuring that a particularend user did not exceed his/her allotted usage of the data network andif the particular end user did exceed the allotted usage, then chargingthe particular end user with overage fees. This may also includecharging the end user on an incremental basis. For example, the end useris charged for each kilobyte or megabyte of content delivered using thedata network. Other limited or metered bases are further within thepurview of this disclosure.

As noted above, the term data network and the billing systems andmethods presented herein should not be limited to mobile data networks.Instead, the term data network and the billing systems and methodspresented herein are applicable to any data network that operates on ametered or limited basis including data networks operated by broadbandservice providers, satellite service providers, and operators of“hotspots” as some examples. Such data networks may use one or morenetwork technologies propagated by the Institute of Electrical andElectronics Engineers (IEEE) (e.g., 802.3, 802.11, etc.) in addition toor instead of any of the above described wireless network technologies.

As will be explained in greater detail below, integration of the billingsystems and associated methods of some embodiments with a data networkmay involve modifying operation of the DPI server and/or billing serverof the data network. Alternatively, integration of the billing systemsand associated methods of some embodiments with a data network mayinvolve utilizing a DPI server and/or billing server of a third party toperform billing on behalf of the data network.

I. Overview

FIG. 2 provides an overview process 200 for delivering select content toend users over a metered or limited access data network in accordancewith the billing systems and associated methods of some embodiments,whereby the data network usage fees for delivering the select contentover the data network is incurred by the content providers thatoriginate or are the source for the content and not by the end userssubscribers of the data network service provider that request andreceive the select content using the data network.

The process 200 begins by designating (at 210) select content that is topass through the data network as “free content”. Content that isdesignated as free content is content that passes through the datanetwork with the data network usage fees associated with the passing ofsuch content being incurred by the content provider instead of beingincurred by the end users that request or receive such content. In someembodiments, the fees for delivering the free content may be incurred bya third party promoter instead of the content provider. The third partypromoter can be an entity that promotes content of a content provider onbehalf of the content provider. The content provider may use an onlineinterface provided by the data network service provider to designatesome or all of its content as free content. In some embodiments, thecontent provider designates some or all of the its content as freecontent using an online interface that is provided by a content deliverynetwork (CDN) that is partnered with one or more data networks toprovide the billing system functionality described herein. It should beapparent to one of ordinary skill in the art that other means besides anonline interface may be used to designate the free content. For example,a content provider may directly contact an agent of the data network todesignate some or all of its content as free content. Also, an agent ofthe data network may contact a content provider when the data networkdesires to offer its end user subscribers certain content free of datanetwork usage fees as a way to differentiate its offerings from otherdata networks or service providers.

The incentive for a content provider to incur the data network usagefees that are related to the delivery of the designated content is thatthe designated content that is delivered free of network usage willlikely reach a larger audience than content that is not delivered freeof network usage fees. This is because end user subscribers thatsubscribe to a voice plan but not a data access plan of a particulardata network service provider will nevertheless be able to receive thedesignated content using that data network. Also, end users that havelimited data access plans are able to receive the designated contentwithout fear of consuming data from their limited data access plan andwithout fear of incurring overage fees.

The designated free content may be identified to the end users throughsearch engine results that provide some indication (e.g., graphical,textual, audible, etc.) as to which websites offer designated freecontent. The content provider may denote the designation of free contentin its URLs or page descriptions (e.g.,www.provider.com/main_free_content.html). Additionally, “apps” orapplications that are downloaded from a store or marketplace may providein the description of the app whether the app accesses designated freecontent of one or more content providers and thus, the app can be usedwithout consuming data from the data access plan of the end user. Insome cases, the particular data network service provider distributes anapplication to its end user subscribers whereby the application can onlybe used to access the designated free content offered by the datanetwork. Consequently, end users are able to consume more contentwithout being charged for such consumption.

The content provider benefits from this increased consumption and theresulting exposure in various ways. One way the content providerbenefits is by creating demand for the designated content and thereaftercharging for continued consumption. For example, the content providerincurs the access fees or network usage fees in order to offerparticular content as part of a free trial. The free trial allows endusers to experiment with and learn about the features and services thatare associated with the particular content without utilizing data fromtheir data access plans and without incurring data network usage fees.At the end of the free trial, the end users, now familiar with thefeatures and services of the particular content, can choose to continueto receive the particular content on a subscription or pay basis and thedata network usage fees for continued access to the particular contentare incurred by the end users. Another way that the content provider canbenefit is by offering one free service in association with the freecontent, but receiving monetary compensation for another service that isassociated with the free content. For example, the free content mayinclude free access to an online store, whereby data usage fees tointeract with the online store are incurred by the content provider.However, any purchases made at the online store are paid to the contentprovider. Another way that the content provider can benefit is byoffsetting the incurred costs by including advertising in the freecontent and by collecting fees from the advertisers for the placement ofthe advertisements in the free content. Yet another way that the contentprovider can benefit is through increased name recognition and increasedmarket share or presence that the content provider can achieve as aresult of offering free access to its content.

The incentive for a data network service provider to participate in sucha billing system is that the service provider is provided a newpromotional platform with which to promote its data network ordifferentiate its service and offerings from other service providers.For example, the service provider offers “hot” content of a particularcontent provider to its end user subscribers for free. End users thatare deciding which service provider to subscribe to for data access mayperceive the free “hot” content as added value in otherwise analogousservice. Other end users may have brand loyalty to a particular contentprovider or may have such interest in the content of a particularcontent provider that a particular service provider offering content ofthe particular content provider for free will persuade the end users tosubscribe to or better value the particular service provider. Forexample, a first service provider may allow free access to news from thecontent provider www.cnn.com as a means to differentiate its service anddata network from a second service provider. Even without thesebenefits, there is no cost to the service provider as the contentproviders reimburse the service provider for whatever cost is offloadedfrom the end users.

The incentive for an end user is that the end user incurs less datanetwork usage fees or consumes less data from a metered or limited datanetwork access plan. As a result, the end user can more freely try newcontent, consume more feature rich content, and receive greater valuefrom otherwise analogous service. More specifically, an end userreceives greater value from a 4G data network service provider thatcharges X dollars for Y megabytes of data and that offers free contentrelative to other 4G data network service providers that also charge Xdollars for Y megabytes of data, but that do not offer any free content.

In some embodiments, the data network service provider may agree tooffset or reduce some of the fees that are incurred by a contentprovider for the delivery of the free content designated by that contentprovider. The service provider may do so when there is perceived benefitto the service provider. For example, the service provider may provideits end user subscribers with free access to certain content withoutpassing the full data network usage fees to the content provider thatoriginates the certain content in order to increase the subscriber baseof the service provider or to promote certain content that can laterresult in increased revenue for the service provider. Continuing withthe example, the service provider may offer free video streaming forvideos of a particular content provider for one month through its datanetwork, where the data network usage fees are not charged to the endusers consuming the content or the particular content provider thatoriginates the content. During this one month, end users may enjoy freeaccess to the video service, where the free access involves being ableto consume unlimited video content from the particular content providerwithout consuming data from the data access plan subscribed to by theend users. Also during this one month, the service provider agrees notto charge the content provider for the network usage that is related tothe delivery of the content provider's video content. After the onemonth free period, the end users may decide to continue accessing thevideo streaming service albeit with having to pay data network usagefees. In this manner, the service provider can entice end users toconsume more content or consume more feature rich content, therebygenerating greater revenue for the service provider as a result ofincreased data network usage in the long term.

With reference back to FIG. 2 and upon designating (at 210) the freecontent, the process configures (at 220) the one or more DPI serversthat perform data network usage metering to allow the designated freecontent to pass to end users free of charge while billing the propercontent provider for the passing of such free content. The process thenfilters (at 230) the data network usage that is associated with thecontent passing through the data network based on the configurationperformed at step 220 above. The filtering can be performed as thecontent passes through the data network or at appointed times. Thefiltered data network usage is then used to bill (at 240) each end userfor its usage of the data network that is not related to the delivery ofthe designated free content and to bill each content provider for thenetwork usage that is related to content of the content provider thathas been designated as free content and that is delivered to one or moreend users. In some embodiments, the billing system bills contentproviders at the same rate as end users for the data network usage. Insome embodiments, the billing system bills content providers at areduced rate or different rate than what end users get billed for theirdata network usage.

II. Data Network Integrated Solution

In some embodiments, the billing system and associated methods areimplemented using existing infrastructure of the data network serviceprovider. In some such embodiments, the billing system and associatedmethods are implemented using at least one DPI server of the datanetwork. Generally, the DPI server is any server at a gateway of thedata network whereby traffic entering and exiting the data network canbe inspected by the DPI server. The DPI server can include differentservers for different data networks. For a mobile data network, the DPIserver may include the PDN GW as one example. In some embodiments, thebilling system and associated methods are further implemented using abilling server of the data network. The billing server may be a separateserver that is communicably coupled to the DPI server or may beimplemented on the same hardware as the DPI server. Generally, thebilling server is any server that performs the task of billing end usersfor their usage of the data network.

To implement the billing system and associated methods, the operation ofthe DPI server is modified in some embodiments to perform data networkusage filtering in conjunction with deep packet inspection. FIG. 3presents a process 300 describing the operation of the DPI server whenmodified to perform data network usage filtering in accordance with someembodiments. Specifically, the DPI server filters the data network usagethat is related to the delivery of the designated free content from theend user usage logs and enters the filtered usage to the appropriatecontent provider usage logs. As noted above, an end user usage log isthe data structure that tracks data network usage on an individual enduser basis and a content provider usage log is the data structure fortracking the data network usage that is related to the delivery ofselect content of a particular content provider where that selectcontent is designated as free content.

The process begins by configuring (at 310) the DPI server with a list ofidentifiers for identifying the content that has been designated as freecontent. The list of identifiers may identify one or more of 1) IPaddresses, ports, IP blocks, subnets, or some combination thereof foridentifying the content providers that originate or are the source ofthe designated free content, 2) IP addresses, ports, IP blocks, subnets,or some combination thereof for identifying a CDN that deliversdesignated free content on behalf of a content provider, 3) IPaddresses, ports, or some combination thereof for identifyingapplications that run on end user devices and that are used to requestand receive the designated free content, and 4) DNS records URLs, orpacket header parameters for identifying the content that is designatedas free content.

The process monitors (at 320) content passing through the data networkto meter usage of the data network. To monitor the data network usage,the process performs DPI of the content passing through the datanetwork. In some embodiments, the DPI involves inspection of the datapackets in which the content is encapsulated. Specifically, the DPIserver inspects the headers of the data packets. The inspectionidentifies which end users receive which content and the usage of thedata network (e.g., how many bytes of data) that is related to thedelivery of the content to those end users. End users are identifiedbased on the IP addresses assigned to the devices or machines of the endusers. The inspection also identifies if the data packets encapsulatingthe content specify one or more identifiers of the configured list ofidentifiers. If so, the encapsulated content is content that has beendesignated as free content. As such, the network usage associated withdelivering that content should not be charged to the end user subscriberof the data network that receives that content.

It should be apparent to one of ordinary skill in the art that themonitoring can be performed on different bases than on an end userbasis. For example, the DPI server can monitor for the designated freecontent on a per IP address basis, wherein two or more distinct endusers may be associated with a single IP address or on a per devicebasis, wherein the same end user may have multiple devices that consumecontent using the data network.

Based on the inspection, the process populates (at 330) the end userusage logs by filtering the data network usage that is related to thedelivery of the designated free content from the end user usage logswhile entering the data network usage that is related to the delivery ofother non-free content to the end user usage logs. In some embodiments,filtering the data network usage that is related to the delivery of thedesignated free content involves wholly omitting any record of thatnetwork usage from the end user usage logs. In some embodiments,filtering the data network usage that is related to the delivery of thedesignated free content involves entering the content that was deliveredin the appropriate end user usage log and entering a value of zero forthe data network usage associated with the delivery of that content.

FIG. 4 illustrates filtering network usage by omitting from an end userusage log, record of the network usage that is related to the deliveryof the designated free content. FIG. 4 illustrates the data networkusage that is related to the delivery of three separate items of content410, 420, and 430. During inspection, the DPI server identifies thatcontent 410 and 430 include one or more identifiers from the configuredlist of identifiers for identifying the designated free content.Accordingly, the network usage associated with delivering content 410and 430 is filtered from the end user usage log 440 by omitting suchnetwork usage from the end user usage log 440. The figure illustratesthe resulting filtered end user usage log 440 that tracks only thenetwork usage that is related to delivery of content 420 which is notdesignated as free content.

FIG. 5 illustrates filtering network usage by zeroing out the networkusage that is related to the delivery of designated free content from anend user usage log. FIG. 5 illustrates the data network usage that isrelated to the delivery of three separate items of content 510, 520, and530. During inspection, the DPI server identifies that content 510 and530 include one or more identifiers from the configured list ofidentifiers for identifying the designated free content. Accordingly,the network usage associated with delivering content 510 and 530 isfiltered from the end user usage log 540 by zeroing out such networkusage from the end user usage log 440. The figure illustrates theresulting filtered end user usage log 540 that tracks each of the threeitems of content 510, 520, and 530, but only the network usage that isassociated with content 520 is shown with a non-zero value.

In any case, the filtered end user usage logs can then be processed by abilling server. The billing server is tasked with billing end users fortheir usage of the data network that is not related to the delivery ofthe designated free content.

In some embodiments, the DPI server is further configured to generatethe content provider usage logs. Content provider usage log generationmay be performed in conjunction with the process 300 or as anindependent process that is performed by the DPI server. In some suchembodiments, the data network usage that the DPI server filters from theend user usage logs is instead entered to the appropriate contentprovider usage logs. During inspection, the DPI server identifies theappropriate content provider that originates or is the source for thedesignated free content and the data network usage that is related tothe delivery of that designated free content. Such information ispopulated to the content provider usage log that is associated with theidentified content provider. In some embodiments, the DPI serveridentifies the content provider that originates or is the source for thedesignated free content based on the source IP address and/or sourceport in the header of the one or more packets encapsulating thedesignated free content, whereby the source IP address and/or portidentifies the content provider that originates or is the source of theidentified designated free content. In some embodiments, the DPI serveridentifies the content provider that originates or is the source for thedesignated free content based on the URL or domain name that is in theHTTP GET request used to request the designated free content.

FIG. 6 conceptually illustrates a DPI server 610 inspecting contentpassing through a data network and filtering the corresponding datanetwork usage to end user usage logs and content provider usage logs inaccordance with some embodiments. The figure illustrates 1) the DPIserver 610, 2) four items of content 620, 630, 640, and 645 passingthrough the data network and, as a result, passing through the DPIserver 610, 3) a configuration 650 of the DPI server 610 specifying alist of identifiers for identifying content that has been designated asfree content, 4) end user usage log 660, and 5) content provider usagelogs 670.

The first item of content 620 is passed from a source content providerthat is assigned an IP address of 87.65.43.21 to a destinationapplication that uses port 60,000 on an end user device that is assignedIP address 12.34.56.78. The first item of content 620 is identified bythe URL “www.free.com/video1.flv”. The DPI server 610 inspects the enduser request that is used to request the first item of content 620, theresponse to the request containing the actual first item of content 620that is passed back to the end user, or both. During inspection, the DPIserver 610 identifies, based on the configuration 650, and morespecifically based on the URL of the requested content matching to a URLthat is specified in the configuration 650, that the network usageassociated with delivering the first item of content 620 should not becharged to the end user, but to the content provider that is the sourceor that originates the first item of content 620. Consequently, the datanetwork usage that is associated with the request and/or delivery of thefirst item of content 620 is filtered from the end user usage log forthe end user requesting the first item of content 620. Instead, the DPIserver 610 identifies the content provider that originates or is thesource for the first item of content 620 and enters the data networkusage that is associated with the request and delivery of the first itemof content 620 to the appropriate content provider usage log 670 forthat identified content provider. In some embodiments, the contentprovider is identified based on the configuration 650, wherein the URLmatches to an entry in the configuration 650 that specifies anidentifier (e.g., IP address) of the identified content provider. Insome embodiments, the content provider is identified based on theaddressing of the data packets used to encapsulate the first item ofcontent 620. For example, the first item of content 620 may beencapsulated in an IP packet and the header of the IP packet includes asource address parameter that identifies the IP address of the contentprovider. Designating content as free content based on the URL or basedon a DNS record allows content providers to designate whole domains orspecific files or objects as free content.

The second item of content 630 is passed from a content provider havingan IP address 111.222.3.4 to the same end user (receiving the first itemof content 620) but from an application that uses port 60,100. Thesecond item of content 630 is identified by the URL“www.example.com/image.jpg”. During inspection, the DPI server 610identifies, based on the configuration 650, and more specifically basedon the port of the requesting/receiving application matching to a portspecified in the configuration 650, that the network usage associatedwith delivering the second item of content 630 should not be charged tothe end user, but to the content provider that is the source or thatoriginates the second item of content 630. Consequently, the DPI server610 filters the data network usage that is associated with deliveringthe second item of content 630 from the end user usage log of the enduser that receives the second item of content 630. Instead, the DPIserver 610 identifies the content provider that originates or is thesource for the second item of content 630 and enters the data networkusage that is associated with the request and delivery of the seconditem of content 630 to the appropriate content provider usage log 670for that identified content provider. Designating content as freecontent based on the IP address and/or port of the end user device orreceiving application allows content providers to develop specialapplications that end users can run on their devices in order to receivefree content. The end users can be assured that any content accessedusing the specific application will not incur network usage fees. Itshould be apparent that such an application can be used to access freecontent from different content providers irrespective of whether thecontent providers are assigned different addressing, so long as theapplication requesting and receiving the content uses the port that isspecified in the configuration 650 as one for receiving free content.

The third item of content 640 is passed from the content provider havingan IP address 111.222.3.4 to an end user that is assigned IP address1.2.3.4. The third item of content 640 is identified by the URL“www.example.com/image.jpg”. During inspection, the DPI server 610identifies the content 640 as billable content. Unlike the second itemof content 630, the network usage for the third item of content 640 isbillable to the requesting and receiving end user even though thecontent being delivered is the same as the content delivered in theabove example for the second item of content 630. In this figure, thenetwork usage associated with delivering the second item of content 630is not billable to the end user because the second item of content 630is requested and received by an application that is provided access tothe content without incurring data network usage fees (identified byport 60,100 in the configuration 650). However, the network usageassociated with delivering the third item of content 640 is billable tothe end user because the third item of content 640 is requested andreceived using a different application (e.g., a generic browser usingport 80) that the service provider has not specified in theconfiguration 650 as one that receives content without incurring networkusage fees. Moreover, the third item of content 640 and the source fromwhich the third item of content 640 is passed are also not identified inthe configuration 650 as content or a source that do not incur networkusage fees. Accordingly, the DPI server 610 enters the 100 kilobytes ofdata network for delivering the third item of content 640 (i.e.,image.jpg) to the corresponding end user usage log 660 for the end userhaving IP address 1.2.3.4. The data network usage that is related to thedelivery of the third item of content 640 is not entered to the contentprovider usage logs 670.

The fourth item of content 645 is passed from a content provider havingIP address 11.22.33.44 to the end user that is assigned IP address1.2.3.4. The fourth item of content 645 is identified by the URL“www.abc.com/video/vid1.mpg”. During inspection, the DPI server 610identifies, based on the configuration 650, and more specifically basedon the source IP address of the content provider matching to an IPaddress that is specified in the configuration 650, that the networkusage associated with the delivery of the fourth item of content 645should not be charged to the end user, but to the content provider thatis the source or that originates the fourth item of content 645.Consequently, the DPI server 610 filters the data network usage that isassociated with delivering the fourth item of content 645 from the enduser usage logs. Instead, the DPI server 610 identifies the contentprovider that originates or is the source for the fourth item of content645 and enters the data network usage that is associated with therequest and delivery of the fourth item of content 645 to theappropriate content provider usage log 670 for that identified contentprovider. Filtering based on the source IP address and/or source port ofthe content provider allows some or all content of the content providerto be designated as free content. It should be noted that the source IPaddress header field in a packet encapsulating content that is sent froma content provider to an end user can be used to identify the contentprovider, whereas the destination IP address header field in a requestfor content that is sent from an end user to a content provider can beused to identify the content provider.

With reference to FIG. 6 above, the designated free content isidentified based on a single identifier whether the URL, destinationport, or source IP address. In some embodiments, the DPI server may beconfigured to identify the designated free content based on two or moreidentifiers. For example, content that is sent from a particular sourceIP address and that has a particular file name is designated as freecontent, whereas content that is sent from a different IP address butthat has the same file name is not designated as free content. Thisallows for more granularity is designating the free content.

Also with reference to FIG. 6 above, the filtering is performedon-the-fly as content passes through the DPI server of the data networkservice provider. Such a billing method is referred to herein ason-the-fly filtering. In addition to or instead of on-the-fly filtering,some embodiments perform delayed filtered, whereby the filtering of datanetwork usage that is related to the delivery of the designated freecontent is performed at appointed times. In some such embodiments, theDPI server tracks all data network usage to end user usage logs as wouldbe done in a typical scenario of metering end user usage of a datanetwork. Then at an appointed time, the DPI server filters the end userusage logs to remove or zero out the network usage that is related tothe delivery of content that is designated as free content. Theappointed time may include a time when the service provider performsbilling to determine how much to bill end users based on their usage ofthe data network. For example, the DPI server may perform delayedfiltering at the end of each month or whenever a billing cycle for anend user subscriber is to end.

It should be apparent that in some delayed filtering embodiments, theDPI server tracks all data network usage to a single master usage log.Then at the appointed time, the DPI server filter the master usage logto produce the filtered end user logs that do not include the networkusage that is related to the delivery of the content that is designatedas free content and to produce the content provider usage logs thatinclude the network usage that is related to the delivery of the contentthat is designated as free content.

FIG. 7 presents a process 700 that is performed by the DPI server toperform delayed filtering in accordance with some embodiments. Theprocess begins by configuring (at 710) the DPI server with a list ofidentifiers for identifying the content that is designated as freecontent. As described above, this may include configuring the DPI serverwith one or more IP addresses, port numbers, IP blocks, subnets, or somecombination thereof to identify the designated free content.Additionally, this may include configuring the DPI server with one ormore DNS records, URLs, or domain names to identify the designated freecontent. The process further includes configuring (at 720) the DPIserver with one or more appointed times with which to filter some or allof the end user usage logs. For example, a first appointed time mayoccur when a billing cycle (e.g., monthly billing cycle) for some butnot all end user subscribers occurs on the third day of each month and asecond appointed time may occur when the billing for a different set ofend user subscribers occurs on the eighth day of each month.

The process monitors (at 730) data network usage for content that isrequested by and delivered to end user subscribers of a data networkservice provider operating the DPI server. The process records (at 740)such data network usage to the appropriate end user usage logs. In someembodiments, the data network usage is instead recorded to a masterusage log that is later partitioned to produce the end user usage logs.

While tracking and recording the data network usage, the processdetermines (at 750) if one or more of the appointed times for filteringone or more of the end user usage logs is reached. If not, the processreverts to step 730 and continues to track and record data network usageto the end user usage logs. However when an appointed time is reached,the process retrieves (at 760) the one or more end user usage logs thatare to be filtered at that appointed time. Retrieving the end user usagelogs may include selectively retrieving only those end user usage logsthat are to be filtered at the particular appointed time that isreached, while other end user usage logs are not retrieved. As notedabove, this may occur when the end of a billing cycle for different endusers falls on different dates. Alternatively, all end user usage logsmay be retrieved all at once. In some embodiments, retrieving the enduser usage logs may include (1) taking a snapshot copy of the end userusage logs as they exist and then subsequently appending additionalnetwork usage to the logs after the snapshot is taken, (2) temporarilylocking the end user usage logs from further modification, or (3)retrieving the current set of end user usage logs and appendingadditional data network usage to a new set of end user usage logs.

The process filters (at 770) the retrieved end user usage logs accordingto the configured list of identifiers. Filtering involves processing atleast one retrieved end user usage log to identify data network usagethat is related to the designated free content and to zero out or removesuch identified usage from the end user usage log. Filtering may furtherinvolve producing the content provider usage logs based on the networkusage that is filtered from the end user usage logs. The process cancontinue by reverting back to step 730 or terminate once all retrievedend user usage logs are filtered.

Process 700 is described above with reference to the DPI server.However, it should be apparent to one of ordinary skill in the art thatpart of the process may be offloaded to a billing server of the datanetwork that works in conjunction with the DPI server. For instance at710, the billing server may be configured with the list of identifiersand at step 760, the billing server retrieves the end user usage logsthat are to be filtered at the appointed time from the DPI server andthe billing server performs the filtering at step 770 based on theconfigured list of identifiers.

FIG. 8 conceptually illustrates performing delayed filtering inaccordance with some embodiments. The figure includes a configuration810, a first state 820 for an end user usage log, and a second state 830for the end user usage log. The configuration 810 specifies the list ofidentifiers for identifying content that is designated as free contentand for identifying network usage that is not billable to the end user.The first state 820 for the end user usage log identifies the datanetwork usage that is recorded to the end user usage log prior to theend user usage log being filtered by a DPI server or a billing server ofsome embodiments. The second state 830 for the end user usage logidentifies the data network usage that is recorded to the end user usagelog after the end user usage log has been filtered by the DPI server orbilling server using the identifiers listed in the configuration 810.

The first state 820 of the end user usage log illustrates that the enduser (represented by the end user usage log) used the data network todownload four separate items of content. The network usage associatedwith the delivery of each item of content of the four items of contentis recorded to the first state 820 to the end user usage log. Morespecifically, the end user usage log records a timestamp for when aparticular item of content was delivered, the source and destinationaddressing for each item of content, the URL for each item of content,and the data network usage that is related to the delivery of each itemof content. It should be apparent that end user usage logs may includemore or less information to detail the usage of the data network andthat the filtering can be adapted to filter such information from theend user usage logs.

At an appointed time, the DPI server or billing server that isconfigured with the list of identifiers (see configuration 810)retrieves the first state 820 of the end user usage log and filters theend user usage log according to the list of identifiers presented in theconfiguration 810. As shown, two of the four items of content (see 840and 850) in the end user usage log have identifiers that match one ormore identifiers in the configuration 810. The matching indicates thatthe content represented by entries 840 and 850 is free content and thatthe corresponding data network usage for delivering the free content tothe end user should not be billed to the end user. Accordingly, the DPIserver or billing server filters such network usage from the end userusage log to produce the second state 830 of the end user usage log. Thesecond state 830 of the end user usage log illustrates the end userusage log after the data network usage for the two items of free content840 and 850 have been filtered from the end user usage log. As shown,the amount of data network usage associated with the identified freecontent 840 and 850 is zeroed out. In so doing, the end user that isassociated with the end user usage log presented in FIG. 8 will not bebilled for the data network usage that is related to the delivery of thedesignated free content (content represented by entries 840 and 850).

In some embodiments, the DPI server or billing server is furtherconfigured to generate the content provider usage logs when performingthe delayed filtered that is illustrated with reference to FIGS. 7 and 8above. These steps may be performed in conjunction with the process 700or as a separate process. FIG. 9 conceptually illustrates the DPI serverperforming delayed filtering in which the data network usage that isrelated to the delivery of the designated free content is zeroed outfrom the end user usage logs and is entered in the appropriate contentprovider usage logs.

FIG. 9 is similar to FIG. 8 and illustrates a configuration foridentifying designated free content 910, an end user usage log prior tofiltering 920, and the end user usage log after filtering 930. Thefigure is modified to further include content provider usage logs 940and 950. Specifically, when the DPI server or billing server performsdelayed filtering of the end user usage log, the data network usage thatis related to the delivery of free content is zeroed out from the enduser usage log as described above with reference to FIG. 8.Additionally, the DPI server or billing server transfers the datanetwork usage that is related to the delivery of free content from theend user usage logs to the appropriate content provider usage logs. Inthis example, the appropriate content provider usage log is identifiedbased on an IP address identifier that is associated with the datanetwork usage. As shown, the data network usage that is related to thedelivery of “freesite.com/vid1.mpg” from the content provider with IPaddress 1.2.3.4 to the end user with IP address 10.11.12.13 isidentified as free content. This network usage is zeroed out from thefiltered end user usage log 930 and is entered to the content providerusage log 940 for the content provider with IP address 1.2.3.4.Similarly, the data network usage that is related to the delivery of“example.com/image.jpg” from the content provider with IP address101.22.3.11 to the end user with IP address 10.11.12.13 is identified asfree content. This network usage is zeroed out from the end user usagelog 930 and is entered to the content provider usage log 950 for thecontent provider with IP address 101.22.3.11.

Instead of the filtering performed at step 770 and instead of thefiltering that is illustrated in FIGS. 8 and 9, some embodiments insteadprocess the end user usage logs to identify the network usage that isattributable to the end users and to the content providers. Processingcan be performed without zeroing or removing entries of the end userusage logs and without the need to generate the content provider usagelogs. In some embodiments, processing involves classifying the networkusage that is tracked to the end user usage logs as end user billablenetwork usage and content provider billable network usage. End userbillable network usage identifies the network usage that is not relatedto the delivery of designated free content and that should be chargedagainst end users. Content provider billable network usage identifiesthe network usage that is related to the delivery of designated freecontent and that should be charged against the content providers thatoriginate or are otherwise the source for such content. To classify thenetwork usage, some embodiments tag entries in the end user usage logsas end user billable or content provider billable such that the logsneed not be filtered and separate content provider logs need not begenerated.

FIG. 10 presents a process 1000 for performing delayed filtering byprocessing the end user usage logs in accordance with some embodiments.The process 1000 may begin after performing steps 710-760 of FIG. 7 suchthat at least one end user usage log is aggregated from the DPI serverand each aggregated end user usage log tracks network usage by adifferent end user irrespective of whether the network usage is relatedto the delivery of designated free content or not.

The process 1000 involves scanning (at 1010) an aggregated end userusage log to identify an entry of the end user usage log. Eachidentified entry tracks the network usage for each instance of contentthat is delivered over the data network. Each entry may further recordparameters for identifying the source from which an instance of contentis delivered and the destination that received that instance of content.

The process classifies (at 1020) the identified entry as end userbillable or content provider billable. An end user billable entry is onethat tracks network usage that is related to the delivery of contentthat has not been designated as free content. A content providerbillable entry is one that tracks network usage that is related to thedelivery of content that has been designated as free content. Theprocess classifies the identified entry by determining whether theidentified entry has an identifier that matches to an identifier of thelist of identifiers used to identify the content that is designated asfree content. In some embodiments, classifying the identified entry mayinclude tagging the entry with metadata or one or more other identifiersdesignated the classification of the identified entry. In someembodiments, classifying the identified entry may include copying theentry to a first data structure that stores entries classified as enduser billable or to a second data structure that stores entriesclassified as content provider billable.

The process determines (at 1030) if additional entries remain in the enduser usage log that have not been classified. If so, the process selects(at 1040) the next entry and reverts to step 1020. Otherwise, theprocess bills (at 1050) the end user based on the cumulative networkusage of the entries that are classified as end user billable. Theprocess groups (at 1060) the content provider billable entries on a percontent provider basis. In so doing, the process identifies all theentries from the end user usage log that identify content originated bya specific content provider and content that has been designated as freecontent. Then for each particular content provider, the process bills(at 1070) the particular content provider based on the cumulativenetwork usage in the entries grouped for that particular contentprovider.

III. CDN Solution

In some embodiments, the billing system and associated methods areimplemented using components of a data network that are operated by aservice provider and those of a third party partner. The third partypartner preferably includes a content delivery network (CDN) thatpartners with the data network service provider to offer acceleratedcontent delivery for the end user subscribers of the data network.Implementing the billing system and associated methods of someembodiments with such an integrated architecture may be preferred bysome service providers because it removes much of the configuration andtracking overhead from the service provider. Specifically, the serviceprovider monitors end user usage of the data network in order togenerate end user usage logs. The service provider, however, can rely onthe CDN to track data network usage that is related to the delivery ofthe designated free content and to record such usage in server logs. Thelogs can then be combined and processed to bill end users for theirusage of the data network without fees related to the request anddelivery of designated free content and to bill content providers forthe request and delivery of the designated free content.

FIG. 11 presents an exemplary data network architecture that isintegrated with components of a CDN. In FIG. 11, the data networkincludes the same architectural components 110-160 as those describedwith reference to FIG. 1 above. Additionally, a pair of CDN cachingservers 1110 and 1120 is located in between the PDN GW 140 and theexternal data network. The CDN caching servers 1110 and 1120 arepreferably under the control of the CDN, though partnerships between thedata network service provider and the CDN can blur the line as to whichentity controls and operates the CDN caching servers 1110 and 1120.Additionally, the data network service provider may deploy the cachingservers 1110 and 1120 for the performance and bandwidth savings that thedata network service provider realizes when caching and serving contentfrom the caching server 1110 and 1120 instead of servers that arelocated in the external data network. Specifically, The CDN cachingservers 1110 and 1120 are located at the point in which content entersthe service provider data network from an external data network andcontent exits the service provider data network to an external datanetwork. The CDN caching servers 1110 and 1120 accelerate the deliveryof content to the end users of the data network by caching certaincontent at a geographic location that is proximate to the data networkand by delivering that content from the geographically proximatelocation rather than the longer distance often required to delivercontent from servers of the source content provider. The reduceddistance that the content has to travel results in a better end userexperience as content is delivered to the end user with less latency,packet loss, etc. Additionally, the CDN caching servers 1110 and 1120provide cost savings to the data network service provider, because morecontent can be delivered without accessing the external data network,thereby resulting in reduced usage of the external data network that theservice provider may otherwise have to pay for. Other components of theCDN are not shown for purposes of simplicity. However, it should beapparent to one of ordinary skill in the art that the CDN may operatevarious other caching servers, traffic management servers,administrative servers, and other billing servers independent of thedata network service provider.

In some embodiments, the CDN caching servers 1110 and 1120 areconfigured to exclusively cache and serve the designated free content tothe end user subscribers of the data network. For instance, each of thecaching servers 1110 and 1120 may be preloaded with the content that hasbeen designated as free content and requests for such content areredirected or forwarded to the caching server 1110 and 1120 instead ofthe servers of the source content providers. In some other embodiments,the CDN caching servers 1110 and 1120 are configured to cache serve thedesignated free content in addition to other content.

In some embodiments, the billing system can be adapted to performon-the-fly filtering in the integrated framework of FIG. 11 or somesimilar integrated framework whereby components of the CDN areintegrated with a data network. In such a billing system implementation,the operation of the DPI server is similar to that described withreference to FIG. 3 above. Specifically, the DPI server monitors contentpassing through the data network to generate and populate end user usagelogs with the data network usage that is related to the delivery ofcontent that is not designated as free content. The caching servers ofthe CDN are then used to track the network usage that is related to thedelivery of the designated free content. The billing server aggregatesthe end user usage logs and the caching server logs to then bill the endusers and content providers properly.

FIG. 12 illustrates operation of the billing system when performingon-the-fly filtering in an integrated framework in accordance with someembodiments. The figure illustrates a DPI server 1210, a first cachingserver 1220, a second caching server 1225, and a billing server 1230.

When performing on-the-fly filtering, the DPI server 1210 is configuredwith a list of identifiers 1240 for identifying the content that hasbeen designated as free content. The DPI server 1210 performs a deeppacket inspection of the content passing through the data network. Asbefore, the inspection involves monitoring the data network usage on aper end user basis and entering the usage to the appropriate end userusage logs 1250. Based on the configured list of identifiers 1240, theDPI server 1210 filters from the end user usage logs 1250, the datanetwork usage that is related to the delivery of designated free contentwhile entering the data network usage that is related to the delivery ofcontent that is not designated as free content. Filtering may includeomitting entry or zeroing out entry of the data network usage that isrelated to the delivery of the designated free content. As shown, theend user usage logs 1250 record the data network usage for two separateend users having two different IP addresses. The end user usage logs1250 track the data network usage for each of the two end users with theusage that is related to the delivery of the designated free contentbeing zeroed out.

Each of the caching servers 1220 and 1225 is configured to serve contentthat has been designated as free content. Each of the caching servers1220 and 1225 may also be configured to serve other content that is notdesignated as free content for the purpose of accelerating the deliveryof that content to data network end users that are more geographicallyproximate to one of the caching servers 1220 and 1225 than originservers or other servers of content providers that host the samecontent. Whenever a request for the designated free content is sent froman end user subscriber of the data network, the request is routed to oneof the caching servers 1220 and 1225. Load balancing may be used tobalance the load on each of the caching servers 1220 and 1225. Varioustechniques that are well established in the art can be used to route therequests for the designated free content to the caching servers 1220 and1225 instead of the servers of the content providers that originate orare the source for the designated free content. For example, the DNSrecords for the authoritative DNS servers of the data network arerewritten such that a request for designated free content is resolved toone of the caching servers 1220 and 1225 instead of the content providerthat originates or is the source of the requested content. As anotherexample, hyperlinks to embedded objects of an HTML page that have beendesignated as free content may be rewritten in the base HTML page toresolve to one of the caching servers 1220 and 1225 instead of a serverof the corresponding content provider. If content hosted by one of thecaching servers 1220 and 1225 is not cached at the caching server, thecaching server is configured to retrieve the content from the contentprovider, serve the retrieved content to the requesting end user, andcache the content to satisfy subsequent requests for the content fromcache.

In some embodiments, the caching servers 1220 and 1225 operate asproxies. In some such embodiments, the caching servers 1220 and 1225receive requests for all content, but the caching servers 1220 and 1225serve the requested content from cache when the request is for thedesignated free content.

Each caching server 1220 and 1225 logs network usage that is associatedwith the content that it delivers. Specifically, the caching servers1220 and 1225 log at least one identifier to identify the served contentand the network usage that is associated with that content being served.The logged identifiers and network usage are entered into a server log.As shown, the caching server 1220 populates a first server log 1260 thatidentifies the network usage that is related to the delivery of twoitems of content, wherein the two items of content have been designatedas free content and have been delivered by the caching server 1220. Thecaching server 1225 populates a second server log 1270 that identifiesthe network usage that is related to the delivery of a single item ofcontent that is designated as free content and that has been deliveredby the caching server 1225.

In some embodiments, each caching server 1220 and 1225 may be configuredto populate two server logs, wherein a first server log tracks thenetwork usage that is related to the delivery of the designated freecontent and the second server log tracks the network usage that isrelated to the delivery of content that is not designated as freecontent. In some such embodiments, the caching servers 1220 and 1225 maybe configured with a list of identifiers such that the network usagethat is related to the delivery of the designated free content can bedistinguished from other network usage. In so doing, the network usagethat is related to the delivery of the designated free content can beentered to the illustrated server logs 1260 and 1270, while the networkusage that is related to the delivery of content that is not designatedas free content can be entered to a different set of logs.

At the time of billing, the billing server 1230 aggregates the end userusage logs 1250 from the DPI server 1210 and the server logs 1260 and1270 from the caching servers 1220 and 1225. Since the end user usagelogs 1250 have been filtered to include only data network usage that isrelated to the delivery of content that is not designated as freecontent, the billing server 1230 processes the end user usage logs 1250to bill the end users for such usage. This includes summing the totaldata network usage on a per end user basis and billing each end userbased the end user's respective total network usage. The billing server1230 performs similar processing of the server logs 1260 and 1270 tobill the corresponding content providers for the data network usage thatis related to the delivery of their content that is designated as freecontent. Specifically, the billing server 1230 parses the server logs1260 and 1270 to sum the data network usage that is related to thedelivery of the designated free content for each content provider. Thebilling server 1230 then bills each content provider accordingly for thesummed usage. When the aggregated server logs are intermixed with datanetwork relating to the delivery of the designated free content andother content, the billing server 1230 is configured with a list ofidentifiers to filter the usage to identify only the usage relating tothe designated free content and thereafter bill the content providersaccordingly. However, when the aggregated server logs track usagerelating only to the delivery of the designated free content, then thebilling server 1230 can process the server logs without filtering.

In some embodiments, the billing server 1230 may be comprised of one ormore billing servers that perform the data network usage billing. Insome embodiments, the data network service provider operates a billingserver independent of a billing server that is operated by the CDN. Thedata network billing server bills end users for their usage of the datanetwork based on the filtered end user usage logs. The CDN billingserver bills content providers for their usage of the data network basedon the caching server logs and the metered usage related to the deliveryof the designated free content. In some embodiments, the serviceprovider operates a centralized billing server for billing of end usersand content providers. In still some other embodiments, the CDN operatesa centralized billing server to perform the end user billing and thecontent provider billing.

In some embodiments, the billing system can be adapted to performdelayed filtering in an integrated framework. In such a billing systemimplementation, the DPI populates the end user usage logs with all enduser data network usage regardless of whether the usage is related tothe delivery of the designated free content or not. Accordingly, theoperation of the DPI server is unmodified from its ordinary operation ina typical service provider data network that does not distinguishbetween the designated free content and other content. Similarly in sucha billing system implementation, the caching servers generate andpopulate server logs with the network usage that is related to anycontent delivered from the caching servers to various end users. Theoperation of the caching servers is also unmodified from their ordinaryoperation in a typical CDN. In this delayed filtering integratedframework, the billing server is tasked with aggregating and filteringor processing the end user usage logs from the DPI server and the serverlogs from the CDN caching servers. The billing server filters orprocesses the aggregated logs to bill end users for their usage of thedata network relating to the delivery of content that is designated asfree content and to bill each particular content provider for the enduser data network usage relating to the delivery of content of theparticular content provider that is designated as free content.

FIG. 13 presents a process 1300 performed by the billing server in anintegrated framework whereby delayed filtering is performed inaccordance with some embodiments. The process 1300 begins by configuring(at 1310) the billing server with a list of identifiers for identifyingthe content that is designated as free content. The process furtherinvolves configuring the billing server (at 1320) with one or moreappointed times to perform log filtering or log processing as part ofend user and content provider billing.

The process aggregates (at 1330) the end user usage logs from the DPIserver. The process also aggregates (at 1340) the server logs from thecaching servers of the CDN. In some embodiments, the billing server isconfigured with the addressing and login parameters necessary tocommunicably couple to the DPI server and the CDN caching servers inorder to aggregate the logs from those servers. Any networking protocolor file transfer protocol that is supported by each of the billingserver, DPI server, and CDN caching servers may be used to facilitatethe log aggregation performed at steps 1330 and 1340.

Next, the process filters or processes (at 1350) the aggregated logs toidentify the network usage that is related to the delivery of thedesignated free content from the network usage that is not related tothe delivery of the designated free content. When filtering theaggregated end user usage logs, the process removes or zeros out thenetwork usage that is entered in the end user usage logs and that isrelated to the delivery of the designated free content. When filteringthe aggregated caching server usage logs, the process removes or zerosout the network usage that is entered in the caching server usage logand that is related to the delivery of content that is not designated asfree content. When processing the end user usage logs, the processidentifies or otherwise distinguishes the network usage that is enteredin the end user usage logs and that is related to the delivery ofcontent that is not designated as free content. When processing theaggregated caching server usage logs, the process identifiers orotherwise distinguishes the network usage that is entered in the cachingserver usage logs that is related to the delivery of the designated freecontent.

The process sums (at 1360) the identified data network usage in the enduser usage logs that is related to the delivery of the designated freecontent on a per end user basis. The summed usage is then used togenerate (at 1370) a bill to each end user.

The process also sums (at 1380) the data network usage in the cachingserver usage logs that is related to the delivery of free content on aper content provider basis. This summed usage is then used to generate(at 1390) a bill to each content provider based on the summed datanetwork usage that is associated with the delivered content of thatcontent provider that is designated as free content.

IV. Server System

Many of the above-described processes and components are implemented assoftware processes that are specified as a set of instructions recordedon non-transitory computer readable storage medium (also referred to ascomputer readable medium). When these instructions are executed by oneor more computational element(s) (such as processors or othercomputational elements like ASICs and FPGAs), they cause thecomputational element(s) to perform the actions indicated in theinstructions. Server, computer, and computing machine are meant in theirbroadest sense and may include any electronic device with a processorthat executes instructions stored on computer readable media or that areobtained remotely over a network connection. Examples of computerreadable media include, but are not limited to, CD-ROMs, flash drives,RAM chips, hard drives, EPROMs, etc. Further, wherever a server isidentified as a component of the embodied invention, it is understoodthat the server may be a single physical machine, or a cluster ofmultiple physical machines performing related functions, or virtualizedservers co-resident on a single physical machine, or variouscombinations of the above.

FIG. 14 illustrates a computer system or server with which someembodiments are implemented. Such a computer system includes varioustypes of computer readable mediums and interfaces for various othertypes of computer-readable mediums that implement the processes for thebilling system described above (e.g., the DPI server and the billingserver). Computer system 1400 includes a bus 1405, a processor 1410, asystem memory 1415, a read-only memory 1420, a permanent storage device1425, input devices 1430, and output devices 1435.

The bus 1405 collectively represents all system, peripheral, and chipsetbuses that communicatively connect the numerous internal devices of thecomputer system 1400. For instance, the bus 1405 communicativelyconnects the processor 1410 with the read-only memory 1420, the systemmemory 1415, and the permanent storage device 1425. From these variousmemory units, the processor 1410 retrieves instructions to execute anddata to process in order to execute the processes of the invention. Theprocessor 1410 is a processing device such as a central processing unit,integrated circuit, graphical processing unit, etc.

The read-only-memory (ROM) 1420 stores static data and instructions thatare needed by the processor 1410 and other modules of the computersystem. The permanent storage device 1425, on the other hand, is aread-and-write memory device. This device is a non-volatile memory unitthat stores instructions and data even when the computer system 1400 isoff. Some embodiments of the invention use a mass-storage device (suchas a magnetic or optical disk and its corresponding disk drive) as thepermanent storage device 1425.

Other embodiments use a removable storage device (such as a flash drive)as the permanent storage device Like the permanent storage device 1425,the system memory 1415 is a read-and-write memory device. However,unlike the storage device 1425, the system memory is a volatileread-and-write memory, such as random access memory (RAM). The systemmemory stores some of the instructions and data that the processor needsat runtime. In some embodiments, the processes are stored in the systemmemory 1415, the permanent storage device 1425, and/or the read-onlymemory 1420.

The bus 1405 also connects to the input and output devices 1430 and1435. The input devices enable the user to communicate information andselect commands to the computer system. The input devices 1430 include,but are not limited to, alphanumeric keypads (including physicalkeyboards and touchscreen keyboards) and pointing devices (also called“cursor control devices”). The input devices 1430 also include audioinput devices (e.g., microphones, MIDI musical instruments, etc.). Theoutput devices 1435 display images generated by the computer system. Theoutput devices include, but are not limited to, printers and displaydevices, such as cathode ray tubes (CRT) or liquid crystal displays(LCD).

Finally, as shown in FIG. 14, bus 1405 also couples computer 1400 to anetwork 1465 through a network adapter (not shown). In this manner, thecomputer can be a part of a network of computers (such as a local areanetwork (“LAN”), a wide area network (“WAN”), or an Intranet, or anetwork of networks, such as the Internet.

As mentioned above, the computer system 1400 may include one or more ofa variety of different computer-readable media. Some examples of suchcomputer-readable media include RAM, ROM, read-only compact discs(CD-ROM), recordable compact discs (CD-R), rewritable compact discs(CD-RW), read-only digital versatile discs (e.g., DVD-ROM, dual-layerDVD-ROM), a variety of recordable/rewritable DVDs (e.g., DVD-RAM,DVD-RW, DVD+RW, etc.), flash memory (e.g., SD cards, mini-SD cards,micro-SD cards, etc.), magnetic and/or solid state hard drives, ZIP®disks, read-only and recordable blu-ray discs, any other optical ormagnetic media, and floppy disks.

While the invention has been described with reference to numerousspecific details, one of ordinary skill in the art will recognize thatthe invention can be embodied in other specific forms without departingfrom the spirit of the invention. Thus, one of ordinary skill in the artwould understand that the invention is not to be limited by theforegoing illustrative details, but rather is to be defined by theappended claims.

We claim:
 1. A method for a billing system of a data network, the datanetwork providing a plurality of end users metered access to contentfrom an external data network that is communicably coupled to the datanetwork, the method comprising: configuring at least one identifier foridentifying select content of at least one content provider that hasbeen designated for free delivery to any of the plurality of end userssuch that usage of the data network related to delivering the selectcontent to a particular end user of the plurality of end users is notcharged to the particular end user; inspecting content passing throughthe data network using the at least one identifier to identify datanetwork usage that is related to delivery of the select content based oncontent that comprises the at least one identifier; and generating a logtracking billable usage of the data network by the particular end user,wherein generating the log comprises i) entering into the log, datanetwork usage by the particular end user that is not related to deliveryof the select content and ii) filtering from the log, data network usageby the particular end user that is related to delivery of the selectcontent.
 2. The method of claim 1 further comprising configuring thebilling system to track data network usage on a per end user basis foreach end user of the plurality of end users.
 3. The method of claim 1further comprising billing the particular end user based on the log forthe data network usage by the particular end user that is not related tothe delivery of the select content without billing the particular enduser for the data network usage that is related to the delivery of theselect content.
 4. The method of claim 3 further comprising billing aparticular content provider of the at least one content provider for thedata network usage that is related to the delivery of the select contentwhen the particular content provider is a source for the select content.5. The method of claim 4, wherein billing the particular contentprovider comprises billing the particular content provider for the datanetwork usage that is related to delivery of the select content to theparticular end user and at least one other end user of the plurality ofend users.
 6. The method of claim 3, wherein billing the particular enduser comprises i) deducting the data network usage by the particular enduser that is not related to the delivery of the select content from anallotted amount of usage that is provided as part of a data networkaccess plan subscribed to by the particular end user and ii) notdeducting the data network usage by the particular end user that isrelated to the delivery of the select content from the allotted amountof usage.
 7. The method of claim 3, wherein billing the particular enduser comprises i) billing the particular end user on a per incrementamount for the data network usage by the particular end user that is notrelated to the delivery of the select content and ii) not billing theparticular end user for the data network usage by the particular enduser that is related to the delivery of the select content.
 8. Themethod of claim 1, wherein filtering from the log, the data networkusage by the particular end user that is related to the delivery of theselect content comprises not entering the data network usage that isrelated to the delivery of the select content to the log.
 9. The methodof claim 1, wherein filtering from the log, the data network usage bythe particular end user that is related to delivery of the selectcontent comprises zeroing out the data network usage that is related tothe delivery of the select content from the log.
 10. The method of claim1, wherein filtering from the log, the data network usage by theparticular end user that is related to the delivery of the selectcontent comprises issuing credit to the particular end user for the datanetwork usage that is related to the delivery of the select content. 11.A method for a billing system of a data network, the data networkproviding a plurality of end user subscribers of the data networkmetered access to content from an external data network that iscommunicably coupled to the data network, the method comprising:configuring the billing system with at least one identifier foridentifying select content of at least one content provider, whereindata network usage fees associated with delivering the select content toany of the plurality of end user subscribers is not charged to an enduser subscriber receiving the select content; tracking data networkusage that is related to content passing between the plurality of enduser subscribers and the external network to at least one log that isstored to a non-transitory storage medium of the billing system;processing the at least one log to identify (i) data network usage by aparticular end user of the plurality of end users that is related todelivery of the select content and (ii) data network usage by theparticular end user that is not related to delivery of the selectcontent, wherein the data network usage by the particular end user isidentified using the at least one configured identifier and anaddressing parameter identifying the particular end user; and billingthe particular end user a fee based on the identified data network usageby the particular end user that is related to the delivery of the selectcontent including the identified data network usage by the particularend user that is not related to the delivery of the select content inthe fee.
 12. The method of claim 11, wherein processing the at least onelog comprises processing the at least one log at an appointed time thatindicates an end of a billing cycle for the particular end user.
 13. Themethod of claim 11, wherein the at least one log is a first log, andwherein processing the at least one log comprises entering the datanetwork usage that is not related to the delivery of the select contentto a second log, wherein the second log tracks data network usage thatis related to delivery of the select content of a particular contentprovider that is the source for the select content.
 14. The method ofclaim 13 further comprising billing the particular content provider tocharge the particular content provider for the data network usage thatis related to the delivery of the select content of the particularcontent provider and that is tracked to the second log.
 15. The methodof claim 11 further comprising billing a particular content provider forthe identified data network usage by the particular end user that isrelated to delivery of the select content when the particular contentprovider is the source of the select content.
 16. A method for a billingsystem of a data network, the data network providing a plurality of endusers metered access to content from an external data network that iscommunicably coupled to the data network, the method comprising:providing a configuration for the billing system, the configurationcomprising a set of identifiers to differentiate content that passesthrough the data network as first content and second content; inspectingcontent passing through the data network based on the configured set ofidentifiers to classify the content as first content and second content,wherein the content is passed between a particular end user of theplurality of end users and the external data network; tracking datanetwork usage by the particular end user that is related to delivery ofthe first content to a first data structure that is stored to anon-transitory storage medium of the billing system; tracking datanetwork usage by the particular end user that is related to delivery ofthe second content to a second data structure that is stored to thenon-transitory storage medium, wherein the second content representsselect content of a content provider that is designated for freedelivery to the plurality of end users such that usage of the datanetwork related to delivering the second content to any end user of theplurality of end users is not charged to the end user; and billing theparticular end user for usage of the data network that is tracked to thefirst data structure and the content provider for usage of the datanetwork that is tracked to the second data structure.
 17. The method ofclaim 16, wherein the set of identifiers comprises at least oneidentifier identifying the content provider that provides the secondcontent.
 18. The method of claim 17, wherein the at least one identifieridentifying the content provider comprises at least one of i) an IPaddress of the content provider and ii) an IP address of a contentdelivery network server that serves the second content on behalf of thecontent provider.
 19. The method of claim 16, wherein the set ofidentifiers comprises at least one identifier identifying an applicationfor accessing the second content from the data network using a networkenabled device of an end user.
 20. The method of claim 16, wherein theset of identifiers comprises at least one of a Domain Name System (DNS)request for requesting the second content and a Uniform Resource Locator(URL) identifying the second content.
 21. A billing system for a datanetwork service provider, wherein the service provider provides a set ofend user subscribers metered access to the data network, the billingsystem comprising: a deep packet inspection (DPI) component configuredwith at least one identifier for identifying select content from thecontent that is delivered between the set of end user subscribers and anexternal data network, the DPI component i) tracking to end user usagelogs, billable data network usage that is not related to delivery of theselect content based on content that does not comprise the at least oneidentifier and ii) filtering from the end user usage logs, non-billabledata network usage that is related to delivery of the select contentbased on content that does comprise the at least one identifier; and abilling component assessing a fee to a particular end user of the set ofend user subscribers based on billable data network usage by theparticular end user that is tracked to a particular filtered end userusage log of the end user usage logs representing billable data networkusage by the particular end user.
 22. The billing system of claim 21,wherein the DPI component further tracks non-billable data network usageto at least one content provider usage log that tracks the data networkusage related to delivery of select content of a particular contentprovider.
 23. The billing system of claim 21, wherein the billingcomponent further assess a fee to the content provider for non-billableusage of the data network that is related to delivery of the selectcontent provided by the content provider.
 24. A billing system for adata network service provider, wherein the service provider provides enduser subscribers of the service provider metered access to the datanetwork, the billing system comprising: a deep packet inspection (DPI)component tracking usage of the data network on an end user subscriberbasis based on content that is delivered between the end usersubscribers and an external data network to which the data network iscommunicably coupled; and a billing component configured with at leastone identifier for identifying select content from the content that isdelivered between the end user subscribers and the external datanetwork, the billing component i) identifying usage of the data networkthat is not related to delivery of the select content and ii) assessinga fee to each end user subscriber based on each end user subscriber'sidentified usage of the data network that is not related to delivery ofselect content.
 25. The billing system of claim 24, wherein the DPIcomponent tracks usage of the data network to a set of logs, each logfor tracking usage of the data network by a different end usersubscriber, and wherein the billing component filters usage of the datanetwork that is related to delivery of the select content from the setof logs by filtering the set of logs to remove data network usage thatis related to delivery of the select content.
 26. The billing system ofclaim 24, wherein the billing component is configured with at least oneidentifier that comprises at least one of i) an identifier foridentifying a content provider that provides the select content, ii) anidentifier for identifying an application for accessing the selectcontent from a network enabled device of an end user subscriber, iii) aDNS request for the select content, and iv) a URL identifying the selectcontent.